{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"7fe0de287e931e07cb96ecf1f449b2ebdb0e1115","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"9894c79fd9466612d0514be157b5c30cd93aa645","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"cd569b87378b9c33ae13c23d6bb9d205d66f7c4b","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"d3b7ffa90f613938128432c7b2f35b7aa4bdd86b","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"955c5d670b5ae07c78f4345e23a895638db96ce1","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"17866f8a0822d414cb02e621cf003a7d04396ef8","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"},{"lessThan":"8cafcb881364af5ef3a8b9fed4db254054033d8a","status":"affected","version":"9a53c3a783c2fa9b969628e65695c11c3e51e673","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"2.6.19"},{"lessThan":"2.6.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.252","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.202","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.165","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.128","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.75","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.14","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0","versionType":"original_commit_for_fix"}]}],"cveId":"CVE-2026-45915","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfat: avoid parent link count underflow in rmdir\n\nCorrupted FAT images can leave a directory inode with an incorrect\ni_nlink (e.g. 2 even though subdirectories exist). rmdir then\nunconditionally calls drop_nlink(dir) and can drive i_nlink to 0,\ntriggering the WARN_ON in drop_nlink().\n\nAdd a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the\nparent link count when it is at least 3, otherwise report a filesystem\nerror.","epss":{"date":"2026-11-06","percentile":0.05272,"score":0.0016},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793980392556,"publishedAt":1779884250699,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/7fe0de287e931e07cb96ecf1f449b2ebdb0e1115"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/9894c79fd9466612d0514be157b5c30cd93aa645"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/cd569b87378b9c33ae13c23d6bb9d205d66f7c4b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d3b7ffa90f613938128432c7b2f35b7aa4bdd86b"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/955c5d670b5ae07c78f4345e23a895638db96ce1"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/17866f8a0822d414cb02e621cf003a7d04396ef8"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/8cafcb881364af5ef3a8b9fed4db254054033d8a"}],"remediation":[],"revision":"de0f7fee8944d8a3136174a2536c57ce90b1524fc249d121b4a15cf473dbdd1a","sources":[{"modifiedAt":1793980392556,"name":"CNA: Linux","retrievedAt":1793981773242,"url":"https://www.cve.org/CVERecord?id=CVE-2026-45915"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793981786446,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-45915"}],"ssvc":{"assessedAt":1793979861682,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"fat: avoid parent link count underflow in rmdir","updatedAt":1793981786446}